It's the memory adjustment button to adjust how far the shade will go down when engine is running. I just tucked it up out of the way. My shade comes down about even with the dark sun block on the top of the windshield. It acts as a sun visor.
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Ed & Bev Felker
Retired USAF Col and retired Nurse
Traveling with Lily & Bella ('Teddy Bear' breed)
2015 Vegas 24.1 (E-350)
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